HMS J1 later HMAS J1 was a Royal Navy J class submarine built by HM Dockyard at Portsmouth in Hampshire and launched on 6 November 1915. J1 operated in patrols in the North Sea during World War I. She was transferred along with 5 other J class submarines to Australia on 25 March 1919 and operated out of Geelong in Victoria. She was paid off on 12 ...